CN1241020C - Oil-soaking motor shaft rotation speed measurer - Google Patents
Oil-soaking motor shaft rotation speed measurer Download PDFInfo
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- CN1241020C CN1241020C CN 02110814 CN02110814A CN1241020C CN 1241020 C CN1241020 C CN 1241020C CN 02110814 CN02110814 CN 02110814 CN 02110814 A CN02110814 A CN 02110814A CN 1241020 C CN1241020 C CN 1241020C
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- oil
- motor
- transition axis
- rotation speed
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Abstract
The present invention relates to a rotation speed measurer of an oil-soaking motor shaft. A flange especially designed is used under the condition of not changing the original installing structure of a motor, the rotation speed of a shaft is connected with a testing element by a connection shaft, a testing element does not need to be put into oil, and the measurement of the rotation speed of a motor shaft is realized.
Description
Technical field
The present invention relates to a kind of rotation-speed measuring device of motor, particularly relate to a kind of oil-soaking motor shaft rotation speed measurer.
Background technology
The measurement of motor reel rotating speed all is to adopt on motor shaft or the axle side is installed detecting element generally speaking, and for example photoelectric encoder etc. is measured.But for the oil-immersed type motor, because motor is to move in mineral oil, and detecting elements such as photoelectric encoder can not normally operation in oil for a long time.Therefore how can be for a long time, realization immersion oil rotating speed of motor measurement stable and easy, easy row is a difficult problem that perplexs engineering circle always.Design a lot of ways in order to address this problem people, although the structure of various realizations is arranged, general thought is consistent, is exactly how photoelectric encoder and fluid to be isolated the realization measurement.Sum up to get up substantially and can be divided into following two classes:
The one, detecting element good seals such as photoelectric encoder are placed in the oil directly link to each other (adopting the grease proofing formula scrambler of special construction design also can fall under this category) with the oil-immersed type motor.The benefit of this mode maximum is exactly that mounting structure is consistent with the dry type motor, and motor directly links to each other with photoelectric encoder, has save intermediate link, and to the no requirement (NR) of motor putting position.But its shortcoming is also the most obvious: the detection of a photoelectric encoder, dismounting and replacing be very inconvenience all, the mechanically actuated that could be correlated with to photoelectric encoder after the oil in the fuel tank must being extracted out; The structures shape of b photoelectric encoder self complexity of seal form, and can photoelectric encoder operate as normal directly depend on the effect of sealing.
The 2nd, in oil, be delivered to outside the oil by the rotating speed of transition apparatus motor, utilize detecting elements such as photoelectric encoder to measure again.This mode can be divided into two kinds: a kind of is the axle rotating speed of motor to be delivered to that oil is outer to be measured by mechanical rotation device.Another kind is the axle rotating speed of motor to be delivered to that oil is outer to be measured by transition axis.Preceding a kind of mode because mechanical driving device has suitable quality, therefore can produce added moment of inertia with the motor high-speed rotation time.The high-speed rotation of mechanical driving device in oil also will overcome corresponding fluid viscous resistance in addition, can produce the additional drag square in the corresponding installation site of motor.Mechanical driving device also has the drive gap that self can't overcome simultaneously, can produce impact when the motor high-speed rotation, and serious meeting causes misinformation moving.These unfavorable factors can exert an influence to the operate as normal of normal operation of motor and testing element on the one hand, have caused the further loss of energy on the other hand.Therefore this mode does not finally obtain promoting.A kind of mode in back is to utilize the vertical installation of oil-immersed type motor, by transition axis motor speed is delivered to from the motor rear portion photoelectric encoder is installed more than the oil level again.Transition axis itself can be done gently and be little, can regard the extension of motor reel as, therefore can not constitute any influence to motor performance.Jap.P. JP 1281278 adopts this structure, and the oil-immersed type motor tilts to be positioned in the fuel tank, and the motor rear portion is quoted transition axis and stretched out the installation and removal that pasta is beneficial to photoelectric encoder.The advantage of this mode is need not use any packoff, reliable operation.Its shortcoming is, a Oiltank structure complexity, and the fixing vertical motor must be provided with in fuel tank or vertical installing plate and fixed head.The b motor is vertically placed, and installation and removal all are not easy, and have made things convenient for detecting element, but detected element have been caused inconvenience.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of oil-soaking motor shaft rotation speed measurer, measures its rotating speed under the condition that does not change the former mounting structure of motor easily and accurately.
For solving the problems of the technologies described above, oil-immersed type motor speed measurement mechanism of the present invention, motor output shaft is by a shaft coupling, rotating speed is passed to a transition axis with photoelectric encoder, this transition axis is installed in the flange, be connected with the output shaft of testing element by shaft coupling, described flange passes the sidewall of fuel tank, fix by O-ring seal and screw, skeleton lip rubber oil sea and rolling bearing have been put in the flange, oil sealing, the internal diameter of rolling bearing matches with the diameter of axle of transition axis, and the output shaft of motor adopts shaft coupling to connect with transition axis, and transition axis adopts spring coupling to connect with testing element.
Owing to adopt said structure, the motor that will move in mineral oil by shaft coupling couples together with placing the testing element outside the oil, avoided testing element to place oil, under the condition that does not change the former mounting structure of motor, just can realize measuring its rotating speed easily and accurately, and installing/dismounting is all very convenient.
Description of drawings
Fig. 1 is the structural drawing of oil-immersed type motor speed measurement mechanism of the present invention;
Fig. 2 is a joint flange structure enlarged drawing among Fig. 1.
The number in the figure explanation:
Among Fig. 1, the 1st, fuel tank, the 2nd, hydraulic oil, the 3rd, operation valve group, the 4th, hydraulic pump, the 5th, oil-immersed type motor, the 6th, motor are assisted output shaft (when motor output shaft is not easy to carry out the machinery installation, utilizing auxiliary output shaft to install), the 7th, the Hooks coupling universal coupling, the 8th between auxiliary output shaft of motor and the transition axis, transition axis, the 9th, the joint flange of particular design, the 10th, testing element.
Among Fig. 2, the 9th, flange, the 12nd connects the spring coupling between transition axis and the measuring sensor, the 13rd, the nut that the fixing seal oil sealing is used, the 14th seals between flange and the stationary plane (fuel tank sidewall) with O-ring seal, the 15th, the sealing transition axle skeleton lip rubber oil sea, the 16th, rolling bearing, the 17th, fixedly rolling bearing nut arranged.
Embodiment
As shown in Figure 1, 2, oil-soaking motor shaft rotation speed measurer of the present invention, motor output shaft 6 passes to transition axis 8 by shaft coupling 7 with rotating speed, transition axis 8 is installed in the flange 9, be connected by the output shaft of shaft coupling 12, motor speed be delivered to the process that detects outside the oil in oil thereby finished with testing element 10.The structure of flange 9 has been finished the sealing and the support problem of transition axis 8, has simultaneously also finished the sealing problem of flange 9 self.
Referring to Fig. 2, the position perforate coaxial on the sidewall of fuel tank 1 with motor 5 output shafts, flange 9 is passed this hole and be fixed on fuel tank 1 sidewall, the interior outside of flange 9 fixing threaded holes install respectively that two O-ring seals 14 are used for and fuel tank 1 sidewall between seal, to prevent that fluid from leaking from fixing threaded hole, gib screw plays pressuring action.In flange 9, put into skeleton lip rubber oil sea 15, there is skeleton lip rubber oil sea to claim rotary shaft lip seal again, be widely used in doing in the low-pressure system rotating seal, for guaranteeing sealing effectiveness, used two equidirectional successively arrangements of identical oil sealing in actual applications, and fixed its position with hold-down nut 13.Simultaneously put into rolling bearing 16 in flange 9, hold-down nut 17 is used for fixing the position of bearing.Oil sealing 15 matches with the internal diameter of bearing 16 and the diameter of axle of transition axis 8, then transition axis 8 is passed oil sealing 15 and bearing 16 in fuel tank 1 sidewall lateral, has finished 8 sealings of 16 pairs of transition axises of oil sealing 15 and bearing and support like this.
What the shaft coupling 7 between motor output shaft 6 and the transition axis 8 adopted is small-sized Hooks coupling universal coupling.Because Hooks coupling universal coupling is mainly used in the connection of intersecting two between centers, its axis angle maximum that connects diaxon can reach 40 °～45 °, therefore adopt it can have bigger surplus to adjust between motor output shaft 6 and the transition axis 8 because the same axis error that processing and alignment error are caused makes the transmission of rotating speed steady.And adopt it can not produce specific (special) requirements to machining precision and installation accuracy.What adopt between transition axis 8 and the testing element 10 in addition is that spring coupling 12 connects.Because the anti-exterior mechanical interference capability of testing element 10 self is very limited, therefore in installation, must guard against the employing rigid attachment, and adopt spring coupling to connect more, its effect also is in order to eliminate the coaxial error effect between the transition axis 8 that caused in processing and the installation process and testing element 10 input shafts.Avoided like this testing element 10 sealing is immersed in the oil, thereby prolonged serviceable life of testing element 10.In addition, when testing element 10 needed to change because of damaging, only the mounting screw that need be fixed on the flange 9 unloaded, and testing element 10 is extracted from spring coupling 12 gently, newer testing element 10 was inserted to fix in the spring coupling 12 to get final product.Keep in repair again and change after need not the oil in the fuel tank 1 all drained, make maintenance operation very easy, the easy row that becomes like this.
The present invention has not only satisfied the performance requirement that system is measured motor rotational shaft speed fully, can not make oil liquid leakage, and the rotating speed transmission is steady, does not almost have noise.
Claims (3)
1, a kind of oil-soaking motor shaft rotation speed measurer, it is characterized in that: motor output shaft is by a shaft coupling, rotating speed is passed to a transition axis with photoelectric encoder, this transition axis (8) is installed in the flange (9), be connected by the output shaft of shaft coupling (12) with testing element (10), flange (9) passes the sidewall of fuel tank (1), be fixed on the fuel tank by O-ring seal and screw, skeleton lip rubber oil sea (15) and rolling bearing (16) have been put in the flange (9), oil sealing (15), the internal diameter of rolling bearing (16) matches with the diameter of axle of transition axis (8), the output shaft of motor (6) adopts shaft coupling (7) to connect with transition axis (8), and transition axis (8) adopts spring coupling (12) to connect with testing element (10).
2, oil-soaking motor shaft rotation speed measurer according to claim 1 is characterized in that: the axis angle maximum that the shaft coupling between output shaft of motor (6) and the transition axis (8) is (7) two can reach 40 °～45 °.
3, oil-soaking motor shaft rotation speed measurer according to claim 1 is characterized in that: the skeleton lip rubber oil sea (15) that has in the flange (9) is two, and equidirectional successively arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110814 CN1241020C (en) | 2002-02-08 | 2002-02-08 | Oil-soaking motor shaft rotation speed measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110814 CN1241020C (en) | 2002-02-08 | 2002-02-08 | Oil-soaking motor shaft rotation speed measurer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1437028A CN1437028A (en) | 2003-08-20 |
| CN1241020C true CN1241020C (en) | 2006-02-08 |
Family
ID=27628293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02110814 Expired - Fee Related CN1241020C (en) | 2002-02-08 | 2002-02-08 | Oil-soaking motor shaft rotation speed measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1241020C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860936A (en) * | 2017-11-06 | 2018-03-30 | 国网福建省电力有限公司 | Crank of circuit breaker rotary shaft speed measuring device |
| CN108426022A (en) * | 2018-04-18 | 2018-08-21 | 上海拔山自动化技术有限公司 | A kind of direct-connected mounting structure of pipeline and rotary encoder |
| CN110568223B (en) * | 2019-10-17 | 2021-12-07 | 上海三菱电梯有限公司 | Motor magnetic encoder detection system |
-
2002
- 2002-02-08 CN CN 02110814 patent/CN1241020C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1437028A (en) | 2003-08-20 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060208 Termination date: 20190208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |